GB2088539A - Heat pump and method of operating same - Google Patents

Heat pump and method of operating same Download PDF

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Publication number
GB2088539A
GB2088539A GB8023608A GB8023608A GB2088539A GB 2088539 A GB2088539 A GB 2088539A GB 8023608 A GB8023608 A GB 8023608A GB 8023608 A GB8023608 A GB 8023608A GB 2088539 A GB2088539 A GB 2088539A
Authority
GB
United Kingdom
Prior art keywords
heat
heat pump
restricting means
transfer fluid
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8023608A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUNTON ELECTRONICS Ltd
Original Assignee
GUNTON ELECTRONICS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUNTON ELECTRONICS Ltd filed Critical GUNTON ELECTRONICS Ltd
Priority to GB8023608A priority Critical patent/GB2088539A/en
Publication of GB2088539A publication Critical patent/GB2088539A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B11/00—Compression machines, plants or systems, using turbines, e.g. gas turbines
    • F25B11/02—Compression machines, plants or systems, using turbines, e.g. gas turbines as expanders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/14—Power generation using energy from the expansion of the refrigerant
    • F25B2400/141—Power generation using energy from the expansion of the refrigerant the extracted power is not recycled back in the refrigerant circuit

Abstract

A heat pump circuit includes a flow restricting means (13) for controlling the pressure of heat transfer fluid entering an evaporator (10). Energy expended by the fluid in the restricting means is tapped for use elsewhere in the circuit. As shown, the flow restricting means includes a body (17) which rotates about an axis (18) and which is provided with spring loaded vanes (21). Magnetic elements (22) on the body (17) induce an electric current in a coil, the current being used to drive a fan (15) adjacent the evaporator. <IMAGE>

Description

SPECIFICATION Heat pump and method of operating same A first aspect of the present invention relates to a heat pump, primarily for use in transferring heat to the interior of a house.
A heat pump circuit comprises an evaporator unit, a condenser unit and a pump for driving a heat transfer fluid between the two units. The heat transfer fluid in the evaporator unit derives energy from a heat source, which source may be warm air which surrounds the unit. Heat transfer fluid which is boiling in the evaporator unit absorbs latent heat from the heat source and is able usefully to impart this heat when condensing in the condenser unit.
The pump, which is upstream of the condenser unit, compresses the heat transfer fluid to aid condensation. The pressure of fluid entering the evaporator unit is controlled by a restricting means upstream of the evaporator unit. Control of the pressure drop across the restricting means enables the boiling point of transfer fluid in the evaporator unit to be set at a temperature appropriate to the temperature of the heat source.
According to the invention, there is provided a heat pump with a passage through which a heat transfer fluid flows, restricting means for restricting the flow of said fluid through the passage and transmitting means for transmitting to another element of the heat pump energy imparted to the restricting means by fluid flowing through the passage.
By this means, energy which is expended at the restricting means may be tapped.
Preferably the heat pump includes controlling means sensitive to the temperature of the heat source for controlling the degree of restriction of the flow by the restricting means in accordance with said temperature. The transmitting means may supply energy to a fan which causes air to pass over the evaporator of the heat pump.
Where the heat source is warm air, the rate of transfer of heat between the air and the transfer fluid is increased by using a fan to increase the quantity of air which contacts the evaporator unit in a given time. The efficiency of the pump is thereby improved.
Preferably, the restricting means comprises a body in the passage which is arranged to be driven in a cyclical manner by the flow of heat transfer fluid through the passage. In the preferred embodiment, the transmitting means converts the mechanical energy of the body into electrical energy.
According to a second aspect of the invention there is provided a method of operating a heat pump wherein energy imparted to a flow restricting means by the passage of heat transfer fluid is transmitted to a point of use.
Preferably said point of use comprises another element of the heat pump.
One example of a heat pump in accordance with the invention and a manner of use thereof will now be described, with reference to the accompanying drawing which illustrates the heat pump diagrammatically.
In the example illustrated, the heat pump comprises an evaporator unit 10, compressor 11, condenser unit 12 and restricting means 13 connected in a circuit with one another by ducts 16. A heat transfer fluid such as a Freon, passes around the circuit in the direction indicated by the arrows, absorbing heat at the evaporator when boiling and supplying heat at the condenser when condensing. The condenser may supply heat to a point of use directly or it may be in contact with a further heat transfer means (not shown).
The restricting means 13 reduces the pressure of the heat transfer fluid entering the evaporator unit 10 by impeding the flow of the fluid. Such an impedance is effected with a magnetic body 17 in the flow passage of the fluid, the body being constrained to move cyclically in the flow of the heat transfer fluid.
The degree to which the body impedes the flow may be varied.
The magnetic body 17 shown in the drawing rotates about an axis 18 in the flow restricting means 13. The heat transfer fluid enters the means at 19 and leaves at 20. Spring loaded vanes 21 mounted on the body impede the flow of fluid through the means, the pressure of the fluid of the vane causing the body to rotate, and the contact between the tip of the vane and the flow restricting means causing the vane to retract into or advance from the body as rotation takes place.
Magnetic elements 22 on the body 17 induce an electric current in a coil 23 in a transmitting means 14 as the body rotates, the coil being disposed outside the flow restricting means 13 but adjacent thereto. A heat pump of the kind herein described requires power to drive the compressor 11 and a fan 15 driving air over the evaporator. In the example illustrated, the transmitting means is connected to the fan.
The rate of rotation of the body 17 may be controlled by determining the resistance to current in the coil 23. In particular such a control may be effected by varying the pitch of the propellor blades which constitute the fan 15.
For heat pumps in domestic use, the boiling point of the heat transfer fluid in the evaporator unit should be 5 to 10"C below the temperature of the air heat source. The rate of revolution of the fan provides a further controi, in addition to that at the restricting means, for varying the rate of heat transfer.
1. A heat pump with a passage through which a heat transfer fluid flows, restricting means for restricting the flow of said fluid through the passage and transmitting means for transmitting to another element of the heat pump energy imparted to the restricting means by fluid flowing through the passage.
2. A heat pump according to Claim 1 which includes controlling means sensitive to the temperature of the heat source for controlling the degree of restriction of the restricting means in accordance
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Heat pump and method of operating same A first aspect of the present invention relates to a heat pump, primarily for use in transferring heat to the interior of a house. A heat pump circuit comprises an evaporator unit, a condenser unit and a pump for driving a heat transfer fluid between the two units. The heat transfer fluid in the evaporator unit derives energy from a heat source, which source may be warm air which surrounds the unit. Heat transfer fluid which is boiling in the evaporator unit absorbs latent heat from the heat source and is able usefully to impart this heat when condensing in the condenser unit. The pump, which is upstream of the condenser unit, compresses the heat transfer fluid to aid condensation. The pressure of fluid entering the evaporator unit is controlled by a restricting means upstream of the evaporator unit. Control of the pressure drop across the restricting means enables the boiling point of transfer fluid in the evaporator unit to be set at a temperature appropriate to the temperature of the heat source. According to the invention, there is provided a heat pump with a passage through which a heat transfer fluid flows, restricting means for restricting the flow of said fluid through the passage and transmitting means for transmitting to another element of the heat pump energy imparted to the restricting means by fluid flowing through the passage. By this means, energy which is expended at the restricting means may be tapped. Preferably the heat pump includes controlling means sensitive to the temperature of the heat source for controlling the degree of restriction of the flow by the restricting means in accordance with said temperature. The transmitting means may supply energy to a fan which causes air to pass over the evaporator of the heat pump. Where the heat source is warm air, the rate of transfer of heat between the air and the transfer fluid is increased by using a fan to increase the quantity of air which contacts the evaporator unit in a given time. The efficiency of the pump is thereby improved. Preferably, the restricting means comprises a body in the passage which is arranged to be driven in a cyclical manner by the flow of heat transfer fluid through the passage. In the preferred embodiment, the transmitting means converts the mechanical energy of the body into electrical energy. According to a second aspect of the invention there is provided a method of operating a heat pump wherein energy imparted to a flow restricting means by the passage of heat transfer fluid is transmitted to a point of use. Preferably said point of use comprises another element of the heat pump. One example of a heat pump in accordance with the invention and a manner of use thereof will now be described, with reference to the accompanying drawing which illustrates the heat pump diagrammatically. In the example illustrated, the heat pump comprises an evaporator unit 10, compressor 11, condenser unit 12 and restricting means 13 connected in a circuit with one another by ducts 16. A heat transfer fluid such as a Freon, passes around the circuit in the direction indicated by the arrows, absorbing heat at the evaporator when boiling and supplying heat at the condenser when condensing. The condenser may supply heat to a point of use directly or it may be in contact with a further heat transfer means (not shown). The restricting means 13 reduces the pressure of the heat transfer fluid entering the evaporator unit 10 by impeding the flow of the fluid. Such an impedance is effected with a magnetic body 17 in the flow passage of the fluid, the body being constrained to move cyclically in the flow of the heat transfer fluid. The degree to which the body impedes the flow may be varied. The magnetic body 17 shown in the drawing rotates about an axis 18 in the flow restricting means 13. The heat transfer fluid enters the means at 19 and leaves at 20. Spring loaded vanes 21 mounted on the body impede the flow of fluid through the means, the pressure of the fluid of the vane causing the body to rotate, and the contact between the tip of the vane and the flow restricting means causing the vane to retract into or advance from the body as rotation takes place. Magnetic elements 22 on the body 17 induce an electric current in a coil 23 in a transmitting means 14 as the body rotates, the coil being disposed outside the flow restricting means 13 but adjacent thereto. A heat pump of the kind herein described requires power to drive the compressor 11 and a fan 15 driving air over the evaporator. In the example illustrated, the transmitting means is connected to the fan. The rate of rotation of the body 17 may be controlled by determining the resistance to current in the coil 23. In particular such a control may be effected by varying the pitch of the propellor blades which constitute the fan 15. For heat pumps in domestic use, the boiling point of the heat transfer fluid in the evaporator unit should be 5 to 10"C below the temperature of the air heat source. The rate of revolution of the fan provides a further controi, in addition to that at the restricting means, for varying the rate of heat transfer. CLAIMS
1. A heat pump with a passage through which a heat transfer fluid flows, restricting means for restricting the flow of said fluid through the passage and transmitting means for transmitting to another element of the heat pump energy imparted to the restricting means by fluid flowing through the passage.
2. A heat pump according to Claim 1 which includes controlling means sensitive to the temperature of the heat source for controlling the degree of restriction of the restricting means in accordance with said temperature.
3. A heat pump according to any one of the preceding claims wherein the transmitting means supplies energy to a fan which causes air to pass over the evaporator of the heat pump.
4. A heat pump according to any preceding claim wherein the restricting means comprises a body in the passage which is arranged to be driven in a cyclical manner by the flow of heat transfer fluid through the passage.
5. A heat pump according to Claim 4 wherein the transmitting means converts the mechanical energy of the body into electricai energy.
6. A method of operating a heat pump wherein energy imparted to a flow restricting means by the passage of heat transfer fluid is transmitted to a point of use.
7. A method according to Claim 6 wherein said point of use comprises another eiement of the heat pump.
8. A heat pump substantially as herein described with reference to and as shown in the accompanying drawing.
GB8023608A 1980-07-18 1980-07-18 Heat pump and method of operating same Withdrawn GB2088539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8023608A GB2088539A (en) 1980-07-18 1980-07-18 Heat pump and method of operating same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8023608A GB2088539A (en) 1980-07-18 1980-07-18 Heat pump and method of operating same

Publications (1)

Publication Number Publication Date
GB2088539A true GB2088539A (en) 1982-06-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8023608A Withdrawn GB2088539A (en) 1980-07-18 1980-07-18 Heat pump and method of operating same

Country Status (1)

Country Link
GB (1) GB2088539A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336059A (en) * 1993-06-07 1994-08-09 E Squared Inc. Rotary heat driven compressor
WO2004072567A2 (en) * 2003-02-12 2004-08-26 Carrier Corporation Supercritical pressure regulation of vapor compression system
CN103353194A (en) * 2013-07-01 2013-10-16 新奥科技发展有限公司 Refrigerating device control system and control method
CN103353192A (en) * 2013-07-01 2013-10-16 新奥科技发展有限公司 Throttling expansion device and refrigerating system with same
CN103438615A (en) * 2013-09-12 2013-12-11 哈尔滨工业大学 Rotary electromagnetic heat pump system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336059A (en) * 1993-06-07 1994-08-09 E Squared Inc. Rotary heat driven compressor
WO2004072567A2 (en) * 2003-02-12 2004-08-26 Carrier Corporation Supercritical pressure regulation of vapor compression system
WO2004072567A3 (en) * 2003-02-12 2004-12-02 Carrier Corp Supercritical pressure regulation of vapor compression system
CN103353194A (en) * 2013-07-01 2013-10-16 新奥科技发展有限公司 Refrigerating device control system and control method
CN103353192A (en) * 2013-07-01 2013-10-16 新奥科技发展有限公司 Throttling expansion device and refrigerating system with same
CN103353194B (en) * 2013-07-01 2016-06-08 新奥科技发展有限公司 A kind of refrigeration plant controls system and control method
CN103438615A (en) * 2013-09-12 2013-12-11 哈尔滨工业大学 Rotary electromagnetic heat pump system

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